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THAISZIA JOURNAL of BOTANY Occurrence of Some Rare Weeds On Thaiszia - J. Bot., KoSice, 15, Suppl. 1: 35-43, 2005 http;//www.upjs.sk/bz/thalszia/index.html THAISZIA JOURNAL OF BOTANY Occurrence of some rare weeds on the territory of Slovakia PAVOL ELIAS jun. & TiBOR BARANEC Slovak University of Agriculture, Faculty of Agrobiology and Food Resources, Department of Botany, Tr. A. HIinku 2, SK-94976 Nitra, Slovakia, phone: +421 037 6508 444; e-mail: [email protected] ELIAS, P. jun. & BARANEC, T. (2005): Occurrence of some rare weeds on the territory of Slovakia. - Thaiszia - J. Bot. 15, Suppl. 1: 35-43.-ISSN 1210-0420. Abstract: Intensification of agriculture in the past 80 years in Slovakia caused the decrease of distribution and frequency of some weedy species. The recent occurrence of some rare central / European weeds Adonis flammea, Agrostemma githago, Bifora / radians, Lycopsis arvensis, Nigella arvensis, Ranunculus arvensis and Vaccaria hispanica were examined in our study in western and central Slovakia during years 2003-2004. We did not find any locality of Vaccaria hispanica, so the extinct status was confirmed for this species. Very rare species were Bifora radians (1 locality), Lycopsis arvensis (2 localities) and Adonis flammea (4 localities). Agrostemma githago (5 localities) was occurring only in the regions with extensive agriculture, where it can be relatively numerous. Other species were relatively more widespread, 9 localities of Nigella arvensis, 10 localities of Ranunculus arvensis were found during our survey. Historical and recent distribution of the mentioned species is discussed. Keywords: rare weeds, recent distribution, Slovakia. Introduction Since Neolith, weedy plant species fiad adapted gradually to specific ecological conditions in agrocoenoses. Ttie mettiods used in agriculture in Central Europe have changed markedly during past 80 years. This relatively sudden conversion to intensive agriculture caused the decrease of distribution and frequency of some weeds. The native weedy flora has thus depleted and 35 some weed taxa were included in the red lists (ELIAS 1987; FERAKOVA et al. 2001). On the other hand, new alien plant species (named as quarantine weeds) invaded from Asia and North America (SKALICKY 1981). In the last edition of the Red List of Slovak Fern and Vascular Plants; 33 archaeophytic weedy plant species were classified as critically endangered, 24 were presented as endangered, 28 as vulnerable and approximately 25 weeds were missing and extinct (FERAKOVA et al. 2001). The aim of our study was found out the recent occurrence of seven rare Slovak weedy archaeophytes in the territory of western and central Slovakia. Material and Methods The study was carried out during the years 2003 and 2004 at the following phytogeographlcal regions: Podunajska nizina, Biele Karpaty-south Mts., Burda, Ipel'sko-rimavska brazda, Povazsky Inovec Mts., Strazovsk6 vrchy Mts. (part Drienov), Javorie and Pol'ana (Fig. 1) (FUTAK 1980). The data of the recent occurrence of rare weeds Adonis flammea. Agrostemma githago, Bifora radians, Lycopsis arvensis, Nigella arvensis. Ranunculus an/ensis and Vaccaria hispanica were collected by using the methods of the floristic research. The data concerning the historical distribution was achieved from herbariums BP, BRA, BRNU, BRNM, Nl, NIM, KO, PR, PRC, SAV, SLO, SMBB and ZV. Herbarium specimens collected during field research are saved in herbarium Nl. The nomenclature of vascular plants follows MARHOLD (1998) and used herbarium abbreviations are according to HOLMGREN ET AL. (1990) and VOZAROVA & SUTORt (2001). Fig. 1. Area of study, numbers of phytogeographlcal regions according FUTAK (1980). 36 Results and discussion Adonis flammea JACQ. An annual plant, stem is 10-70 cm high; sepals are more or less hirsute and appressed to the deep scarlet. It occurs as typical weed of cereals or on the margins of fields and the fallow lands respectively (TUTIN & AKEROYD 1964). The first evidence of A. flammea was found in archaeological samples from early Neolithic time in Turkey (WILLERDING 1986). FUTAK (1982) cited that Adonis flammea was growing only on the western part of Slovakia at 27 localities in total. But CEftovsKV (1999) confirmed only 3 recent habitats: Lupka hill (near Nitra town), Sokolovce village and Kamenin village. The most recent data was given by J. KUCERA (2001, in verb.) who confirmed the occurrence of A. flammea in the area of Sokolovce village (Biele Karpaty Mts.). Three new localities were discovered during our field research: Kamenica nad Hronom, Bajtava and Salka. The locality near Cenkov village, reported last time in 1950 (KAVKA 1950 BRA), was confirmed during our study. All these localities are near Sturovo town (Fig. 2). The locality on southern slope of Lupka hill near town of Nitra was not confirmed. We can thus conclude that A. flammea is now growing only at 5 localities in Slovakia. Agrostemma githago L. An annual herb with a strong tap root. Stem is branched, 5-150 cm high and covered with long appressed white hairs (HAMMER, HANELT & KNUPFLER 1982). Agrostemma githago has been associated with man for at least 4000 years and in Europe dwellings was present since 2000 B. C. (THOMPSON 1973). It was an abundant weed of cereal (notably wheat and rye) and other arable crops, but in all Europe declined during the period 1910-1960, largely as a result of improved seed cleaning. Now it is occasionally found at various disturbed habitats and in the gardens (FIRBANK 1988). This species was present in Carpathians valley from 6"^ millennium B.C. (HAJNALOVA, 1989). DAVID & DUDICH (1997) mentioned approximately 60 localities of/A. githago up to y. 1970, from 1970 to 1990 23 localities and after y. 1990 only12 localities. CEAOVSKY (1999) confirmed about 10 recent localities in overall Slovakia. We found five localities of A. githago at the study area (Fig. 2). All recorded habitats were small-scale farming fields - 1 local population was near Nitra town (Dolne Stitare village), a lot of micropopulations were located near Skliarovo hamlet (part of Detva town) and 3 localities with abundant number of plants were discovered around town of Krupina (southeastern margin of Krupina town; Poloma hamlet and Knazova dolina hamlet). However DEVANOVA (2002, in verb) have stated the presence of the species at several small-scale farms in Biele Karpaty Mts., our survey at this region was unsuccessful. The summarization of our field data documented that estimation of CEf^ovsKY (1999) was right, 37 because we don't explore sonne other small farms in further parts of Slovakia (Orava region, Kysuce region and in northeastern Slovakia) where recent occurrence of A g/Wago is possible. Bifora radians M. BIEB. An annual plant, 20-40 cm high. Stem is glabreous and usually freely branched. It is the typical weed of cereal fields and vineyards, it grows often in outfields and railways embankments (TUTIN 1968; HLAVACEK, JASICOVA & ZAHRADNIKOVA 1984). S. radians was sparsely distributed, mainly in southem parts of Slovakia. HLAVACEK, JASICOVA & ZAHRADNIKOVA (1984) mentioned 45 localities in total. Recent distribution of Bifora radians is not known. FERAKOVA ET AL. 2001 included the species to the category DD (deficient data) Only one locality of 6. radians was found in whole area of study. It was at small-scale farming field near Kaipina town (Fig. 4). However our study area has not covered whole territory of Slovakia, we suppose that the distribution of this weed is very scarse. The ecosozological status of this species is at least EN (endangered). Lycopsis arvensis L. An annual or biennial hispid plant, stem 10-60 cm high, it is ascending, flowers are blue (CHATER 1972). It grows in fields (mainly in maize, potato and beet), vineyards, fallow lands, field routes etc. (BERTOVA & BERTA 1995). The first archaeological record of L. arvensis was from Bronze Age in Europe (France); the occurrence in Central Europe was approved from 3'^ century B.C. in Germany (ROSCH 1996). The occurrence of L. arvensis in Slovakia is rare, in many regions is missing. BERTOVA & BERTA (1995) found about 40 localities up to y. 1970, 7 localities from y. 1970 to 1990, but any locality since 1990. This taxon is not included to Slovak Red List (FERAKOVA et al. 2001). Two localities of L. arvensis were found during our research (Fig. 4). The first locality was in large maize field near Nitra town. The species was collected in Nitra town already in 1919 (SCHEFFER 1919 SLO) and confirmed again in 1960 (MAJOVSKV 1960 SLO). The second locality was found at small field at Skliarovo hamlet near Detva town. The occurrence of L. arvensis from this region was not known yet. Following our field data, we propose integration of archaeophyte L. an/ensis to Red list of Slovak plant species in the category EN. Nigella arvensis L. An annual plant, stem is erect, 10-40 cm high, flowers are bluish, 20-30 mm in diameter. N. arvensis is a weed of cornfields, vineyards and open grounds (TUTIN & AKEROYD 1964b). The first data of this species are from Central Europe (Germany) from 3"^ to 4'*' century B.C. (WILLERDING 1986) 38 KMEtovA (1982) pointed out that N. arvensis was growing relatively often in all southern parts of Slovakia but it was rare in northern parts of country. The number of historical localities was more than one hundred. Recent distribution of N. arvensis was scarce in the area of study (Fig. 3), only nine localities were recorded. Four documented localities were on the arable soil (Kamenica nad Hronom village - vineyards, Srobarova village - field margin, Zavada village - field margin, Nitrica village - field route). Other localities were on seminatural or ruderal habitats as margins of footways (Podhradie village, Hajnacka village), abandoned soils (Marcelova village) and escarps of roads (Vei'ky Cetin village, Bajtava village). Ranunculus arvensis L. More or less pubescent annual plant, stem is erect and 15-60 cm high, flowers are pale greenish-yellow, 4-12 mm in diameter.
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